我的是:<!DOCTYPE html>
博客园:<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
关于HTML文档类型参考:http://i.wanz.im/2010/05/28/why_doctype_html/
检查发现JS在获取当前页面可视大小,和页面滚动位置有差别!
在页面包含一个2000*2000的DIV是IE和Chrome在不同HTML文档类型测试整理数据如下:
标准:<!DOCTYPE html>
特殊:<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
当HTML中未添加HTML文档类型时,默认为特殊模式!
Chrome标准 | Chrome特殊 | IE标准 | IE特殊 | |
document.body.clientTop; | 0 | 0 | 0 | 2 |
document.body.clientLeft; | 0 | 0 | 0 | 2 |
document.body.clientWidth; | 473 | 473 | 471 | 471 |
document.body.clientHeight; | 2000 | 625 | 2000 | 604 |
document.body.scrollTop; | 224 | 289 | 0 | 255 |
document.body.scrollLeft; | 315 | 388 | 0 | 278 |
document.body.scrollWidth; | 2005 | 2005 | 2005 | 2010 |
document.body.scrollHeight; | 2010 | 2010 | 2000 | 2005 |
document.body.offsetTop; | 0 | 0 | 0 | 0 |
document.body.offsetLeft; | 0 | 0 | 0 | 0 |
document.body.offsetWidth; | 473 | 473 | 471 | 492 |
document.body.offsetHeight; | 2000 | 2000 | 2000 | 625 |
document.documentElement.clientTop; | 0 | 0 | 0 | 0 |
document.documentElement.clientLeft; | 0 | 0 | 0 | 0 |
document.documentElement.clientWidth; | 473 | 473 | 471 | 0 |
document.documentElement.clientHeight; | 625 | 2010 | 604 | 0 |
document.documentElement.scrollTop; | 0 | 0 | 199 | 0 |
document.documentElement.scrollLeft; | 0 | 0 | 241 | 0 |
document.documentElement.scrollWidth; | 2005 | 2005 | 2005 | 492 |
document.documentElement.scrollHeight; | 2010 | 2010 | 2010 | 625 |
document.documentElement.offsetTop; | 0 | 0 | 0 | 0 |
document.documentElement.offsetLeft; | 0 | 0 | 0 | 0 |
document.documentElement.offsetWidth; | 473 | 473 | 492 | 492 |
document.documentElement.offsetHeight; | 2010 | 2010 | 625 | 625 |
分析:
页面总宽度:document.body.scrollWidth;
页面总高度:document.body.scrollHeight;
Chrome页面位置:document.body.scrollTop; document.body.scrollLeft;
Chrome标准页面可视区域:document.documentElement.clientWidth; document.documentElement.clientHeight;
Chrome特殊页面可视区域:document.body.clientWidth; document.body.clientHeight;
IE标准页面位置:document.documentElement.scrollTop; document.documentElement.scrollLeft;
IE标准页面可视区域:document.documentElement.clientWidth; document.documentElement.clientHeight;
IE特殊页面位置:document.body.scrollTop; document.body.scrollLeft;
IE特殊页面可视区域:document.body.clientWidth; document.body.clientHeight;
JS代码如下:
代码如下:
function getSize() {
var obj = new Object();
obj.allWidth = document.body.scrollWidth;
obj.allHeight = document.body.scrollHeight;
if (-[1, ]) { //非IE
obj.top = document.body.scrollTop;
obj.left = document.body.scrollLeft;
if (document.compatMode === 'CSS1Compat') {
obj.width = document.documentElement.clientWidth;
obj.height = document.documentElement.clientHeight;
}
else {
obj.width = document.body.clientWidth;
obj.height = document.body.clientHeight;
}
} else {
if (document.compatMode === 'CSS1Compat') {
obj.width = document.documentElement.clientWidth;
obj.height = document.documentElement.clientHeight;
obj.top = document.documentElement.scrollTop;
obj.left = document.documentElement.scrollLeft;
}
else {
obj.width = document.body.clientWidth;
obj.height = document.body.clientHeight;
obj.top = document.body.scrollTop;
obj.left = document.body.scrollLeft;
}
}
alert(obj.top);
alert(obj.left);
alert(obj.width);
alert(obj.height);
return obj;
}
注:发现博客园首页的HTML文档类型为:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
为什么和随笔展示页不一样呢?
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